Dental unit



2 Sheets-Sheet 1 July 6 ,1926.

o. H. PIEPER DENTAL uun' Filed July 25. 1925 July 6 1926; 1,591,335

. o. H. PIEPER DENTAL UNIT Filed July 25., 1 25 2 sheets-sum 2 PatentedJuly 6, 19 26.

1,,UNITEDST'ATIES a I OSCAR H. PIEZPER, or Manama Nnw Yonx.

i DENTAL UNIT. 1

j Application m d m 25,1925. Serial No. 45,96

My invention relates to dental units of the H type disclosed in Patent#1,376,356,. issued .April 26, 1921, to Oscar H. Pieper' and Al phonseF. Pieper, the object "being to pro? Videfimproved means for enabling'the in j strumeut holder or shelf to be readily ex:

tended and positioned-away"from its sup: porting pedestal in order toincrease the range and facility of use of the various tools.andappliances supported on the shelf and connected through flexiblecords with the Various supply sources, such as for gas, electric power.and air.- The invention contelnplates a jointedsupportingstructure forthe instrument'shelfl which structure will normally securely hold theshelf on the pedestal top and which 'will permit the shelfto be raisedand to be swung forwardly of the pedestal and thenlaterally to bring theinstruments into. convenient position forthe drawihgs- On the r Fig. flis a side elevational yiewfofthe upper end of the dental unitwith'partof the pedestal andethe shelf structurein sec tion;- v Fig. 21sa sectional ylewonplane 2 2 twig-1; and, p

Fig. 3 is a-plan view.

as that in the patent referred-to, and it has the offset oriex tend'ingpart lO at the top andrear for containing the various appliances, asdisclosed in'said patents. A repre-.

sents various instruments or tools connected I by flexible cords or,tubes 11{With'air,,gas,

.or; electric controlling deyices 'housed withv p in the pedestal, allas disclosedin vsaid part ent, weights 12 yieldably. holding the cordsdown in the pedestal? (The cords or tubes j extend through guidethimbles secured in 1 the top 1ft. of the ,pedestaland arrangedin atransverse row in front of the extensio'n ,10'.

Extending downwardly from the pedestal to 14 at; the opposite sidesthereof, are'the tu ular guide lugs 15 and 16, through which areslidable the guide rod structuresv Rand R. Each guiderodstructurecomprisesthe with the lower end'oftheguide lug when lowerend of each ,rod structureterniinates in 'a stop flangeor head forengaging The pedestal P is of the sauce constructio I therods are raisedtheidistance' betweenithe I stop flange and the joint being such thatthe joint will (be just "aboyetthe pedestal"top 14 v00 whenjthestopflange 'ugageswitli the 111g. The-j oint'sho wn is 'of the tongue [andgrooye type, although any other forn 'of joint niay v beusedi Y I;

s at. t eir. as; inl ifiib fir support the instrument. {shelf ,21,.{,1Se"cn ed" on the shelf are the VerticalIinstrumeritsupportingsle'eves or sockets QQi-Which, during 3Q normal position of theishelfabove the pedest-a1" top, are in "axial aligiiinenflwith" thethimbles 13 through which the. cordsor tubes 11. extend, thesleevesreceiving,thelinstruk, inentsA and holding them inproper 'tion byengagement with their "uppe'ife gee, of seating flanges 23'forn1ed' onthe instrument bodies; 5 'i" '75.

The vupper endsof uppeizirod sections are ln reaseddiametertb'pr yideseating shoulders 24 for engaging with; thepedsemi; top to norn'ially":s upp'ont' thel Shelf in horizontal? position above thetop. In thejoints '19 hown; the piv 'r'hingeffaxi's' is parallel" withjthe shelf '2so that with; the *l l' f ii gf 3 h i ?d oi b fh he Shlf with theinstruments thereonfcanberaised until I the i stop flanges 27 engagewith f the guide lug's 15gand16, and the-shelf canl'th'eii beswungforwardly and.-.dot'ynwardly on the a joint axes until the upperrod sections-Hare horizontal and resting against the pedestal top14,theshelf 21 beingfthen in a vertical plane, with the sleeve] 22f'andinstruments 7 horizontal -asj shown'inFigQ1 and" Fig. 3. To increasethe-adjustability of'the instru 'nient shelf, joints 25inayjbefprovide'db'e tween theshelfand theuppe'r rod sections e 17 withthe aXesof thefjoints at right angles withthe axes of the jonits"19, so.that after 1 the shelf has been? swung-in front'offthe 1 pedestal,theaxes of t he', joint 25will bevertical and me' she1fcanthen be swunglaterally, as indicated in Fig. 3, the support.

ing rod structures during suchjlateralswinga ing turning in theguid lugs15 and ltig re spectively. The shelf lhas thus a wide range of .movementandthe i'ristruinents and tools t -a ca b supp te i con n n P sition fortheloperatorg The{thiinbles 125 v are flared and fwell roundecl' attheir upper, v

edges so thatthe' cords or tubes finayfrjeadily follow; the movenient ofthe "shelf "when-"it, is

' us'ted and when the tools' or instr'uinents are being usedi When "theoperatori 'is fi'fifii V lowers it to permit,the'iguide;.rodsto:,slideinto the pedestal and the plate and instru- 7 position secure on top ofthe pedestal.

I thus provide simple" and-eflicient means 7 for e rialoling the variousinstruments and 10 to 'suppoi't'edtin "convenient position forthegoperaton and foriflthe work} to be perfor'mfedi" I dQ JIiQt/fdesire'to be, limited to he xam enstrus i n, arrangeme d P" 15 erationshown and referred to, as changes .mQ. l, fii iQI 5 e p ble wh will amewithin ithe soope ,orfimy, invention, hi1 laimsg l ws=+ f In a d unit,the combination I of na al estr ment u -P r n Shelf wi ls-a me s, o id"elf; (said supgortin' means; permitting said shelf to 'fi'rst' r e' d'the'nto, be swun'ggto in- I a v V I ,a dental'I,unit, ithe combinationof a 'p'ge, alj 'struoture, instrumentsupporting she'lflsupporting rodsnormally supporting aid-she f dis an eeidinedes a p,'dabl'einSaidpedestal to 1d shelfto be, raised, and joints fiinfjfrontfofisaid pedestal. dental innit, the combination of aaninstrument suppprting shelf op; i a ip d stat, ppje f in d, ta1,saidrods being shift shelffto be raised, and ,hinged sections for: pershelfto; I be-,-,swung; forwardly or; the pod tal jafterl, raising-{thereofand then 6 bilaterally unit,itneg'combinatio of a rods supported} onsaidl pedestal ti'callyjfan instrument support 7 shelf} mounted; on; theupper j end of saidiirqdai meansf for limiting the vupward I tofsaidfrOds. andjlthelshelf Jthereon, I in},said rodsnormally A red al;n fl d pt a brfe gh abate'psd s'ar pm per i t e gpp Q -Qlbt gfih shelfin front; of said 'i ha d in a 1 1 1 Co bination of a s t t ta 'r s l esysup prtedr in sa e aL-io has finding, lrtqymentl a hinge 4 i,inormjaiiywit iaui i the pedestal toj permit s'ai'd rods to wung,orwardly', into; horizontal, Posia od iai ra 'g dihe i z h e y whe a1-.I-r1 1/1. a ooare nwertlcal pos tion wlthin sald sai fed Y i-e ewementsthereon will then be in their normal appliance's lto beextended from thepedestal ermittingsaid shelf tobeswung IhIQld', sectibnsQ'and thQ shelf,thereon to 1 ptled iwlieii,shifted above the tnumentl'shelf at theouter ends r wardly, and a hinged connection between said rods andshelf, said hinged connection coroperating with the; lower ends of saidrods to permit lateral swing of said shelf.-

6. In a dental unit, the combinationof a pedestal, vertical guide lugson the top wall of said pedestal, guide rods islidable' in said lugs,each gui'de rod comprising an upper section and a lower section hingedtogether, said lower section being normally below the pedestal top, aninstrument shelf securedto the upper ends of the upper rod sections tobe normally above the pedestal top in horizontal position, said slidingrod structures permitting said shelf to beraised, means stopping theupward"movement ofsaid" ro'd structures when their joints are hinged attheir upper'ends to said" shelf. 7 V

and extending downwardlythrough said guide lugs, lower sections forvsaidrodsse' cured thereto by hinged'connections, means at the lower ends ofsaid" lower sections for stopping-upward movement of said j rod'structures when said hinge connections are raised above the. pedestaltop saidi'rod structures b'eing then adapted to be swung 10 forwardlinto horizontal position tob'rin' J. n

the instrument shelf into a'fvertical plane in ,front of the pedestal,the hinge; connections' between said rods'and she lf then permittingsaid rods'to swing laterally to carry 7 said shelf to various lateralpositions.

8; a de nt'al" unitgt'he combination ofa pedestal," vertical guide lugson said pedestal, an instrument supporting shelf, guide rods havingconnection at their upper ends with said shelf andfextendin throu h saidguide lugswherebytsaidshelf and ro'ds may i be raised"and/lowered,"extensions at "the lower ends of said guide rods having hingedconnection therewitlr and 1 adapted iwvlien raised into; said guideiiugswith'the-"hinged Connections above the pedestaltop to permitiswing'of'fsaidrods into horizontal position to bring said-plate infront of said' pedestal, the connection between said rods andshelfperrnitting horizontal hinge movementwhereby said sh'elf,'aftjerbei'ng brought into positionin frontof'said pedestal, may be swung withsaidrods into various lateral iii ns-f 5 Inwitness whereof; I hereunto;subscribe m 'y niame this 22nd day of'Ju'ly,"192'5L

